Results 61 to 70 of about 35,122 (152)

The Outermost Ejecta of Type Ia Supernovae

, 2007
The properties of the highest velocity ejecta of normal Type Ia supernovae (SNe Ia) are studied via models of very early optical spectra of 6 SNe. At epochs earlier than 1 week before maximum, SNe with a rapidly evolving Si II 6355 line velocity (HVG ...
Cumming R. J., Giuliano Pignata, Hachinger S., Hashimoto M.-A., Ken’ichi Nomoto, Khokhlov A. M., Khokhlov A. M., Lucy L. B., Masaomi Tanaka, Mazzali P. A., Mazzali P. A., Mazzali P. A., Mazzali P. A., Mazzali P. A., Nancy Elias‐Rosa, Paolo A. Mazzali, Rubina Kotak, Stefano Benetti, Stephan Hachinger, Vallery Stanishev   +19 more
core   +2 more sources

SN 2023ehl: A Normal Type Ia Supernova with High-velocity Features

The Astrophysical Journal
SN 2023ehl, a normal Type Ia supernova with a typical decline rate, was discovered in the galaxy UGC 11555 and offers valuable insights into the explosion mechanisms of white dwarfs.
Xiangyun Zeng, Lei Hu, Sheng Zheng, Xiaolong Li, Xiaoyu Luo, Sai Li, D. Andrew Howell, Yize Dong, Stefano Valenti, Liping Fu, Cheng Liu, Shiyu Li, Shuguang Zeng, Yao Huang, Yijing Luo, K. Azalee Bostroem, Curtis McCully, Ali Esamdin, Moira Andrews, Joseph R. Farah, Megan Newsome, Giacomo Terreran, Estefania Padilla Gonzalez, Emily Hoang, Aravind Pazhayath Ravi, Darshana Mehta, Nicolas Meza Retamal, Peng Zhang, Rongjun Zhang, Wang Li, Haonan Zhang   +30 more
doaj   +1 more source

Three-dimensional Structure of Incomplete Carbon–Oxygen Detonations in Type Ia Supernovae

The Astrophysical Journal
Carbon–oxygen (CO) detonation with reactions terminating either after burning of ^12 C in the leading ^12 C +  ^12 C reaction or after burning of ^12 C and ^16 O to Si-group elements may occur in the low-density outer layers of exploding white dwarfs and
A. Khokhlov, I. Domínguez, A. Y. Chtchelkanova, P. Hoeflich, E. Baron, K. Krisciunas, M. Phillips, N. Suntzeff, L. Wang   +8 more
doaj   +1 more source

SN 2024gy: Multiepoch Spectroscopic Features Suggestive of Delayed Detonation in a Type Ia Supernova

The Astrophysical Journal
We present photometric and spectroscopic observations of SN 2024gy, a Type Ia supernova (SN Ia) exhibiting high-velocity features (HVFs) in its early-time spectra. This SN reaches a peak B -band magnitude of −19.25 ± 0.29 mag and subsequently declines by
Liping Li, Zhenyu Wang, Jialian Liu, Yu Pan, Alexei V. Filippenko, Jujia Zhang, Xiaofeng Wang, Brajesh Kumar, Yi Yang, Thomas G. Brink, WeiKang Zheng, Xiangcun Meng, Lingzhi Wang, Zeyi Zhao, Qian Zhai, Yongzhi Cai, Giuliano Pignata, Xinlei Chen, Xingzhu Zou, Jiewei Zhao, Xiangkun Liu, Xiaowei Liu, Xinzhong Er, A. Reguitti, R. Michael Rich, Jon M. Rees, Mark A. Croom, Osmin Caceres, K. Itagaki, Bo Wang, Jinming Bai   +30 more
doaj   +1 more source

The Spatial Distribution of Type Ia Supernovae within Host Galaxies

The Astronomical Journal
We study how type Ia supernovae (SNe Ia) are spatially distributed within their host galaxies, using data taken from the Sloan Digital Sky Survey (SDSS).
Christopher Pritchet, Karun Thanjavur, Connor Bottrell, Yan Gao   +3 more
doaj   +1 more source

Is SN 2006X from a WD + MS system with optically thick wind?

, 2009
The single-degenerate channel is widely accepted as the progenitors of type Ia supernovae (SNe Ia). Following the work of Meng, Chen and Han (2009), we reproduced the birth rate and age of supernovae like SN 2006X by the single-degenerate model (WD + MS)
Blondin, Branch, Chen, Chen, Hachisu, Hachisu, Hachisu, Hamuy, Han, Han, Han, Han, Hillebrandt, Ho, Hurley, Hurley, Iben, Iglesias-Páramo, Kanpen, Kanpen, Kippenhahn, Krisciunas, Langer, Leibundgut, Li, Meng, Nomoto, Nomoto, Nomoto, Perlmutter, Riess, Simon, W. Yang, Wang, Wang, Wang, Wang, Webbink, Whelan, Willems, Wong, X. Geng, X. Meng, Yungelson   +43 more
core   +1 more source

The Hubble Constant from Blue Type Ia Supernovae

The Astrophysical Journal
There is a persistent tension of about 5 σ –6 σ between the value of the Hubble constant, as derived from the local distance ladder versus the cosmic microwave background, signaling either unaccounted for systematics in the measurements or “new physics,”
Christa Gall, Luca Izzo, Radosław Wojtak, Jens Hjorth   +3 more
doaj   +1 more source

The Spectroscopic Diversity of Type Ia Supernovae

, 2012
We present 2603 spectra of 462 nearby Type Ia supernovae (SN Ia) obtained during 1993-2008 through the Center for Astrophysics Supernova Program. Most of the spectra were obtained with the FAST spectrograph at the FLWO 1.5m telescope and reduced in a ...
A. G. Riess, B. P. Schmidt, Barbon, Benetti, Blondin, Blondin, Bloom, Branch, Bravo, Bufano, Burns, Cappellaro, Contreras, Cristiani, de Vaucouleurs, Dessart, Filippenko, Folatelli, Folatelli, Foley, Foley, Foley, Foley, Foley, Gamezo, Ganeshalingam, Ganeshalingam, Garavini, Garavini, Garnavich, Garnavich, Gerardy, Gómez, Hamuy, Hatano, Hicken, Hicken, Hsiao, Jha, Jha, Jha, Jha, K. S. Mandel, Kasen, Kasen, Kasliwal, Kelly, Khokhlov, Krisciunas, Krisciunas, M. Calkins, M. Modjaz, Maeda, Maeda, Mandel, Mandel, Marion, Matheson, Matheson, Matheson, Mazzali, Mazzali, Mazzali, Milne, Modjaz, Modjaz, Modjaz, Naito, Nugent, P. Berlind, P. Challis, P. M. Garnavich, Parrent, Patat, Perlmutter, Phillips, Phillips, Plewa, Prieto, Pskovskii, Quimby, Quimby, R. P. Kirshner, Riess, Riess, S. Blondin, S. W. Jha, Scalzo, Schmidt, Silverman, Silverman, Silverman, Stritzinger, Stritzinger, Strolger, T. Matheson, Tanaka, Tanaka, Thomas, Thomas, Tripp, Turatto, Turatto, Valentini, Wang, Wang, Wang, Wang, Wood-Vasey, Woosley, Yuan, Yuan   +111 more
core   +4 more sources

Type Iax Supernovae

, 2017
Type Iax supernovae (SN Iax), also called SN 2002cx-like supernovae, are the largest class of peculiar white dwarf (thermonuclear) supernovae, with over fifty members known.
AM Khokhlov, JD Lyman, M Zingale, MM Phillips, P Höflich, P Lira, RC Thomas, WH Zhou   +7 more
core   +1 more source

A Common Origin of Normal Type Ia Supernovae Suggested by the Photometric Diversity

The Astrophysical Journal
In recent years, with the increasing number of type Ia supernovae (SNe Ia) discovered soon after their explosions, a nonnegligible fraction of SNe Ia with early-excess emissions (EExSNe Ia) have been confirmed.
Weiyu Wu, Ji-an Jiang, Dezheng Meng, Zelin Xu, Keiichi Maeda, Mamoru Doi, Ken’ichi Nomoto, Naoki Yasuda, Masaomi Tanaka, Toshikazu Shigeyama, Nozomu Tominaga, Željko Ivezić, Peter Yoachim, Saurabh W. Jha, Tinggui Wang, Hisanori Furusawa, Nao Suzuki, Andrew J. Connolly, Satoshi Miyazaki   +18 more
doaj   +1 more source